so in that first mission you have to take, i found that sometimes when it wants you to click a certain button, the button isn't obvious enough. i think the buttons should be brighter compared to the rest, and maybe even a different color.

this could go for any missions where a person has to be told to click some button, make it REALLY OBVIOUS which one is the correct button.

I disagree. Making it less obvious would mean the player has to read what he has to press and search for that button with that name, teaching him where it is much better than if he just aimed for the illuminated one.